<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript">
		/*+*/
			var a=10;
			console.log(a++);
			a=10;
			console.log(++a);
			a="13";
			+a;
			console.log(typeof(a));
		/*-*/
			a=10;
			console.log(a--);
			a=10;
			console.log(--a);
		</script>
	</head>
	<body>
	</body>
</html>
